SCH3U – Unit 1
Study Portfolio
Over the next two weeks you will develop a Chemistry Study Portfolio. The goal of the portfolio is to demonstrate your understanding of: nomenclature, balancing, and reaction types, as well as serve as a study tool for grade 9 and 10 science students.
SCH3U – Unit 1
Your Portfolio will include 2 sections:
1. Nomenclature
2. Types of Chemical Reactions
Each section will include:
a. A written explanation of the topic
b. Completed problems
SCH3U – Unit 1
Your written explanations should be clear and simple. Remember, grade 9’s and 10’s will be using this. You will have to include examples.
Your Portfolio is due the Week of March 19, no later than Friday, March 23.
Rubric:
R / Level 1 / Level 2 / Level 3 / Level 4K/U / Limited understanding of content / Thorough understanding of content.
TI / Limited creativity critical thinking skills / High degree of creativity and critical thinking.
COM / Explanations are confusing or lack detail
Examples do not support explanation.
Gr 9/10 would not benefit / Explanations are clear & easy to follow.
Use of examples supports explanation.
Gr 9/10 student would benefit greatly!
Portfolio Checklist:
* Italicized points represent “extras”. They are not required, but will enhance your portfolio.
Nomenclature: (Reference pages: p. 89-101)
o Completed worksheet
o Explanation with examples for:
o Ionic Compounds (include polyatomic ions and multivalent metals)
o Molecular Compounds
o Acids and bases
o Hydrates
o Helpful websites with animations, activities, self-quizzes
Reaction Types (Reference Pages: p. 114-123, 139):
o Completed worksheet
o Explanation and examples of:
o Synthesis Reactions
o Decomposition Reactions
o Single Displacement Reactions
o Double Displacement Reactions (including neutralization)
o Combustion Reactions
o Helpful websites with animations, activities, self-quizzes
2. Balancing Equations
1. Balance the following skeleton equations:
a) SO2 + O2 ---> SO3 f) N2 + H2 ----> NH3
b) Mg + O2 --> MgO g) P + O2 ------> P4O10
c) NO + O2 ---> NO2 h) KClO4 ------> KCl + O2
d) HgO ------> Hg + O2 i) P4(s) + Cl2(g) ----> PCl5(g)
e) Na + O2 -----> Na2O j) O2 -----> O3
2. Write the following word equations as chemical equations. Balance
a) Lead(II) chloride reacts with sodium chromate to form a precipitate of lead(II) chromate and another product.
b) You may have seen the thick haze commonly found over highly industrial areas. One of the substances responsible for this is ammonium sulphate which forms in the air by the reaction between ammoniaand sulphuric acid.
c) Carbon monoxide burns in oxygen to produce carbon dioxide.
d) When potassium chlorate is strongly heated, it decomposes into potassium chloride and oxygen.
e) The process of photosynthesis in plants produces glucose, C6H12O6, and oxygen, from the raw materials carbon dioxide and water.
f) Magnesium reacts with sulphuric acid, forming magnesium sulphate and releasing hydrogen gas.
g) Ammonia gas and hydrogen chloride gas react to form ammonium chloride, a white solid.
h) Sulphur dioxide, formed during the burning of sulphur containing coal, may be removed from smokestack gases by passing the gases over solid calcium oxide. Calcium sulphite is formed in this reaction.
i) In some water treatment plants, solutions of aluminum sulphate and calcium hydroxide are added to the water. A "sticky" precipitate of aluminum hydroxide forms. This sticky substance removed some of the small particles in the water as it settles to the bottom. There is another substance produced as well.
j) Although bright and shiny, aluminum objects are covered with a tight, invisible coating of aluminum oxide that forms when freshly exposed aluminum reacts with oxygen.
3. Types of Chemical Reactions:
1.Balance the following equations and state their type:
(a) Ca(OH)2 + HCl -----> CaCl2 + H2O
(b) AgNO3 + CaCl2 -----> Ca(NO3)2 + AgCl
(c) Fe2O3 + C ------> Fe + CO2
(e) Pb(NO3)2 + Na2SO4 ------> PbSO4 + NaNO3
(f) Fe2O3 + H2 ------> Fe + H2O
(g) Al + H2SO4 ------> Al2(SO4)3 + H2
(h) C9H20 + O2 ------> CO2 + H2O
(i) KClO3 + heat ------> KCl + O2
(j) H2 + O2 ------> H2O
(k) Mg(OH)2 + HBr ------> MgBr2 + H2O
(l) CH4 + O2 ------> CO2 + H2O
(m) Al(s) + Fe2O3(s) ------> Al2O3(s) + Fe(s)
(n) Fe3O4(s) + H2(g) ------> Fe(s) + H2O(l)
(o)HgO(s) ------> Hg(l) + O2(g)
(p) SiO2(s) + HF(g) ------> SiF4(g) + H2O(l)
2.Write the following word equations as chemical equations. Balance and state the reaction type.
a) Sodium hydroxide, used in many household drain cleaners, can be prepared by the reaction of calcium hydroxide with sodium carbonate. Calcium carbonate is also formed in this reaction.
b) Magnesium hydroxide, commonly called milk of magnesia, is often used to treat heartburn (a build-up of stomach acid, HCl). Write the balanced equation for the reaction if one of the products is water.
c) If a bottle of hydrogen peroxide solution, H2O2, is left to stand at room temperature, oxygen gas is slowly released. After a period of time, the bottle contains only water.
d) Write the balanced equation for the formation of table salt from sodium and gaseous chlorine.
e) Iron can be made to react with molecular oxygen to give iron (III) oxide.